Mudan (牡丹) may refer to:
Paeonia rockii, or Rock's peony, woody species of peony, known as 紫斑牡丹 in Chinese. Paeonia suffruticosa, or tree peony, known as 牡丹 in Chinese.
People's Republic of China Mudan District, Heze, Shandong Mudan River, in Heilongjiang
Republic of China (Taiwan) Mudan, Pingtung, township in Pingtung, Taiwan Mudan Station, railway station of the Taiwan Railway Administration (TRA) Yilan Line, located in New Taipei
See also Mudan Auto, a Chinese bus manufacturer